Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. John Cassidy Duffy, DC

Individual provider Chiropractor · NPI 1942481627

Dr. John Cassidy Duffy, DC is a Chiropractic in Waltham, Massachusetts. Graduated from Life Chiropractic College in 1991, 35 years ago. Accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
35
Trained at
Life Chiropractic College
Licensed in
MA
In the registry since
2007
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

136 Bacon St
Waltham, MA 02451-0797
Phone: (781) 894-4270
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 1644 (MA)

Record details

NPI number1942481627
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorNo
NPI enumeratedNovember 21, 2007
Last updated in NPPESJuly 25, 2023
Certification dateJuly 25, 2023
Mailing address136 Bacon St, Waltham, MA 02451-0797

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCHIROPRACTIC
Medical schoolLIFE CHIROPRACTIC COLLEGE
Graduated 1991 (35 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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